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		<title>简章</title>
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			 .title{
				 color: red;
				 font-size: 20px;
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			 .title1{
				 color: black;
				 font-size: 18px;
				 font-weight: bold;
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			 .content1{
				 background-color: dodgerblue;
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			 .content2{
				 background-color: red;
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			 .content4{
				 background-color: red;
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			 .number1{
				background-color: black;
				width: 20px;
				margin-left: 5px;
				display: inline-table;/*展现--以表格形式来布局*/
				text-align: center;
			 }
			 .number2{
			 				background-color: black;
			 				width: 20px;
			 				margin-left: 5px;
			 				display: inline-table;/*展现--以表格形式来布局*/
			 				text-align: center;
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			 .number3{
			 				background-color: black;
			 				width: 20px;
			 				margin-left: 5px;
			 				display: inline-table;/*展现--以表格形式来布局*/
			 				text-align: center;
			 }
			 .number4{
			 				background-color: black;
			 				width: 20px;
			 				margin-left: 5px;
			 				display: inline-table;/*展现--以表格形式来布局*/
			 				text-align: center;
			 }
			 
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			<div><div class="container">
			<div class="title">高手班(升职加薪利器)</div>
			<div class="title1">第一部分:基础知识进阶(齐雷)</div>
			<div class="content1"><span class="number1">1</span>新接口规范、Lambada表达式、Stream流、新日期</div>
			<div class="content2"><span class="number2">2</span>多线程、并发安全、锁优化、高级集合、JUC并发</div>
			<div class="content3"><span class="number3">3</span>NIO原理分析、RPC设计及框架中NIO的应用实现</div>
			<div class="content4"><span class="number4">4</span>手写类加载器、JVM调优、GC算法及优化</div></div>
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